Instantaneous torque and speed control of BLAC motor using back EMF estimation method

The torque ripple control of Permanent Magnet brushless AC (PMBLAC) motor using fuzzy logic technique is proposed. Due to small inductance, a severe torque ripple is induced by the modulation of a three phase inverter. In the buck boost converter, the dc link suppresses the ripple produced by the three phase inverter by using Pulse Width Modulation (PWM) control. The torque control is done by improving the torque estimation technique.